Use container in comment

Docker is not the commonly used container
technology on UBI-9

docker-bake.hcl

@@ -152,7 +152,7 @@ function "debian_platforms" {
 }
 
 # Return an array of RHEL UBI 9 platforms to use depending on the jdk passed as parameter
-# Note: Jenkins Docker controller only supports jdk-17 and jdk-21 for ubi9
+# Note: Jenkins controller container image only supports jdk-17 and jdk-21 for ubi9
 function "rhel_ubi9_platforms" {
   params = [jdk]
   result = ["linux/amd64", "linux/arm64", "linux/ppc64le"]